vlc_variables.h
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
资源大小:29949k
文件大小:20k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * variables.h: variables handling
- *****************************************************************************
- * Copyright (C) 2002-2004 the VideoLAN team
- * $Id: a7ce058cfdcdaf608eea9ce30501fcd0f3834875 $
- *
- * Authors: Samuel Hocevar <sam@zoy.org>
- * Gildas Bazin <gbazin@netcourrier.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifndef VLC_VARIABLES_H
- #define VLC_VARIABLES_H 1
- /**
- * file
- * This file defines functions and structures for dynamic variables in vlc
- */
- /**
- * defgroup variables Variables
- *
- * Functions for using the object variables in vlc.
- *
- * Vlc have a very powerful "object variable" infrastructure useful
- * for many things.
- *
- * @{
- */
- /*****************************************************************************
- * Variable types - probably very incomplete
- *****************************************************************************/
- #define VLC_VAR_TYPE 0x00ff
- #define VLC_VAR_CLASS 0x00f0
- #define VLC_VAR_FLAGS 0xff00
- /** defgroup var_flags Additive flags
- * These flags are added to the type field of the variable. Most as a result of
- * a __var_Change() call, but some may be added at creation time
- * @{
- */
- #define VLC_VAR_HASCHOICE 0x0100
- #define VLC_VAR_HASMIN 0x0200
- #define VLC_VAR_HASMAX 0x0400
- #define VLC_VAR_HASSTEP 0x0800
- #define VLC_VAR_ISCOMMAND 0x2000
- /** Creation flag */
- /* If the variable is not found on the current module
- search all parents and finally module config until found */
- #define VLC_VAR_DOINHERIT 0x8000
- /**@}*/
- /**
- * defgroup var_action Variable actions
- * These are the different actions that can be used with __var_Change().
- * The parameters given are the meaning of the two last parameters of
- * __var_Change() when this action is being used.
- * @{
- */
- /**
- * Set the minimum value of this variable
- * param p_val The new minimum value
- * param p_val2 Unused
- */
- #define VLC_VAR_SETMIN 0x0010
- /**
- * Set the maximum value of this variable
- * param p_val The new maximum value
- * param p_val2 Unused
- */
- #define VLC_VAR_SETMAX 0x0011
- #define VLC_VAR_SETSTEP 0x0012
- /**
- * Set the value of this variable without triggering any callbacks
- * param p_val The new value
- * param p_val2 Unused
- */
- #define VLC_VAR_SETVALUE 0x0013
- #define VLC_VAR_SETTEXT 0x0014
- #define VLC_VAR_GETTEXT 0x0015
- #define VLC_VAR_GETMIN 0x0016
- #define VLC_VAR_GETMAX 0x0017
- #define VLC_VAR_GETSTEP 0x0018
- #define VLC_VAR_ADDCHOICE 0x0020
- #define VLC_VAR_DELCHOICE 0x0021
- #define VLC_VAR_CLEARCHOICES 0x0022
- #define VLC_VAR_SETDEFAULT 0x0023
- #define VLC_VAR_GETCHOICES 0x0024
- #define VLC_VAR_FREECHOICES 0x0025
- #define VLC_VAR_GETLIST 0x0026
- #define VLC_VAR_FREELIST 0x0027
- #define VLC_VAR_CHOICESCOUNT 0x0028
- #define VLC_VAR_INHERITVALUE 0x0030
- #define VLC_VAR_SETISCOMMAND 0x0040
- /**@}*/
- /*****************************************************************************
- * Prototypes
- *****************************************************************************/
- VLC_EXPORT( int, __var_Create, ( vlc_object_t *, const char *, int ) );
- VLC_EXPORT( int, __var_Destroy, ( vlc_object_t *, const char * ) );
- VLC_EXPORT( int, __var_Change, ( vlc_object_t *, const char *, int, vlc_value_t *, vlc_value_t * ) );
- VLC_EXPORT( int, __var_Type, ( vlc_object_t *, const char * ) LIBVLC_USED );
- VLC_EXPORT( int, __var_Set, ( vlc_object_t *, const char *, vlc_value_t ) );
- VLC_EXPORT( int, __var_Get, ( vlc_object_t *, const char *, vlc_value_t * ) );
- VLC_EXPORT( int, var_SetChecked, ( vlc_object_t *, const char *, int, vlc_value_t ) );
- VLC_EXPORT( int, var_GetChecked, ( vlc_object_t *, const char *, int, vlc_value_t * ) );
- #define var_Command(a,b,c,d,e) __var_Command( VLC_OBJECT( a ), b, c, d, e )
- VLC_EXPORT( int, __var_Command, ( vlc_object_t *, const char *, const char *, const char *, char ** ) );
- /**
- * __var_Create() with automatic casting.
- */
- #define var_Create(a,b,c) __var_Create( VLC_OBJECT(a), b, c )
- /**
- * __var_Destroy() with automatic casting
- */
- #define var_Destroy(a,b) __var_Destroy( VLC_OBJECT(a), b )
- /**
- * __var_Change() with automatic casting
- */
- #define var_Change(a,b,c,d,e) __var_Change( VLC_OBJECT(a), b, c, d, e )
- /**
- * __var_Type() with automatic casting
- */
- #define var_Type(a,b) __var_Type( VLC_OBJECT(a), b )
- /**
- * __var_Set() with automatic casting
- */
- #define var_Set(a,b,c) __var_Set( VLC_OBJECT(a), b, c )
- /**
- * __var_Get() with automatic casting
- */
- #define var_Get(a,b,c) __var_Get( VLC_OBJECT(a), b, c )
- /*****************************************************************************
- * Variable callbacks
- *****************************************************************************
- * int MyCallback( vlc_object_t *p_this,
- * char const *psz_variable,
- * vlc_value_t oldvalue,
- * vlc_value_t newvalue,
- * void *p_data);
- *****************************************************************************/
- VLC_EXPORT( int, __var_AddCallback, ( vlc_object_t *, const char *, vlc_callback_t, void * ) );
- VLC_EXPORT( int, __var_DelCallback, ( vlc_object_t *, const char *, vlc_callback_t, void * ) );
- VLC_EXPORT( int, __var_TriggerCallback, ( vlc_object_t *, const char * ) );
- /**
- * __var_AddCallback() with automatic casting
- */
- #define var_AddCallback(a,b,c,d) __var_AddCallback( VLC_OBJECT(a), b, c, d )
- /**
- * __var_DelCallback() with automatic casting
- */
- #define var_DelCallback(a,b,c,d) __var_DelCallback( VLC_OBJECT(a), b, c, d )
- /**
- * __var_TriggerCallback() with automatic casting
- */
- #define var_TriggerCallback(a,b) __var_TriggerCallback( VLC_OBJECT(a), b )
- /*****************************************************************************
- * helpers functions
- *****************************************************************************/
- /**
- * Set the value of an integer variable
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- * param i The new integer value of this variable
- */
- static inline int __var_SetInteger( vlc_object_t *p_obj, const char *psz_name, int i )
- {
- vlc_value_t val;
- val.i_int = i;
- return var_SetChecked( p_obj, psz_name, VLC_VAR_INTEGER, val );
- }
- #define var_SetInteger(a,b,c) __var_SetInteger( VLC_OBJECT(a),b,c)
- /**
- * Set the value of an boolean variable
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- * param b The new boolean value of this variable
- */
- static inline int __var_SetBool( vlc_object_t *p_obj, const char *psz_name, bool b )
- {
- vlc_value_t val;
- val.b_bool = b;
- return var_SetChecked( p_obj, psz_name, VLC_VAR_BOOL, val );
- }
- /**
- * Set the value of a time variable
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- * param i The new time value of this variable
- */
- static inline int __var_SetTime( vlc_object_t *p_obj, const char *psz_name, int64_t i )
- {
- vlc_value_t val;
- val.i_time = i;
- return var_SetChecked( p_obj, psz_name, VLC_VAR_TIME, val );
- }
- /**
- * Set the value of a float variable
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- * param f The new float value of this variable
- */
- static inline int __var_SetFloat( vlc_object_t *p_obj, const char *psz_name, float f )
- {
- vlc_value_t val;
- val.f_float = f;
- return var_SetChecked( p_obj, psz_name, VLC_VAR_FLOAT, val );
- }
- /**
- * Set the value of a string variable
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- * param psz_string The new string value of this variable
- */
- static inline int __var_SetString( vlc_object_t *p_obj, const char *psz_name, const char *psz_string )
- {
- vlc_value_t val;
- val.psz_string = (char *)psz_string;
- return var_SetChecked( p_obj, psz_name, VLC_VAR_STRING, val );
- }
- /**
- * Trigger the callbacks on a void variable
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- static inline int __var_SetVoid( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t val;
- val.b_bool = true;
- return var_SetChecked( p_obj, psz_name, VLC_VAR_VOID, val );
- }
- #define var_SetVoid(a,b) __var_SetVoid( VLC_OBJECT(a),b)
- /**
- * Set the value of a pointer variable
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- * param ptr The new pointer value of this variable
- */
- static inline
- int var_SetAddress( vlc_object_t *p_obj, const char *psz_name, void *ptr )
- {
- vlc_value_t val;
- val.p_address = ptr;
- return var_SetChecked( p_obj, psz_name, VLC_VAR_ADDRESS, val );
- }
- #define var_SetAddress(o, n, p) var_SetAddress(VLC_OBJECT(o), n, p)
- /**
- * __var_SetBool() with automatic casting
- */
- #define var_SetBool(a,b,c) __var_SetBool( VLC_OBJECT(a),b,c)
- /**
- * __var_SetTime() with automatic casting
- */
- #define var_SetTime(a,b,c) __var_SetTime( VLC_OBJECT(a),b,c)
- /**
- * __var_SetFloat() with automatic casting
- */
- #define var_SetFloat(a,b,c) __var_SetFloat( VLC_OBJECT(a),b,c)
- /**
- * __var_SetString() with automatic casting
- */
- #define var_SetString(a,b,c) __var_SetString( VLC_OBJECT(a),b,c)
- /**
- * Get an integer value
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline int __var_GetInteger( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t val;
- if( !var_GetChecked( p_obj, psz_name, VLC_VAR_INTEGER, &val ) )
- return val.i_int;
- else
- return 0;
- }
- /**
- * Get a boolean value
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline bool __var_GetBool( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t val; val.b_bool = false;
- if( !var_GetChecked( p_obj, psz_name, VLC_VAR_BOOL, &val ) )
- return val.b_bool;
- else
- return false;
- }
- /**
- * Get a time value
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline int64_t __var_GetTime( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t val; val.i_time = 0L;
- if( !var_GetChecked( p_obj, psz_name, VLC_VAR_TIME, &val ) )
- return val.i_time;
- else
- return 0;
- }
- /**
- * Get a float value
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline float __var_GetFloat( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t val; val.f_float = 0.0;
- if( !var_GetChecked( p_obj, psz_name, VLC_VAR_FLOAT, &val ) )
- return val.f_float;
- else
- return 0.0;
- }
- /**
- * Get a string value
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline char *__var_GetString( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t val; val.psz_string = NULL;
- if( var_GetChecked( p_obj, psz_name, VLC_VAR_STRING, &val ) )
- return NULL;
- else
- return val.psz_string;
- }
- LIBVLC_USED
- static inline char *__var_GetNonEmptyString( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t val;
- if( var_GetChecked( p_obj, psz_name, VLC_VAR_STRING, &val ) )
- return NULL;
- if( val.psz_string && *val.psz_string )
- return val.psz_string;
- free( val.psz_string );
- return NULL;
- }
- /**
- * __var_GetInteger() with automatic casting
- */
- #define var_GetInteger(a,b) __var_GetInteger( VLC_OBJECT(a),b)
- /**
- * __var_GetBool() with automatic casting
- */
- #define var_GetBool(a,b) __var_GetBool( VLC_OBJECT(a),b)
- /**
- * __var_GetTime() with automatic casting
- */
- #define var_GetTime(a,b) __var_GetTime( VLC_OBJECT(a),b)
- /**
- * __var_GetFloat() with automatic casting
- */
- #define var_GetFloat(a,b) __var_GetFloat( VLC_OBJECT(a),b)
- /**
- * __var_GetString() with automatic casting
- */
- #define var_GetString(a,b) __var_GetString( VLC_OBJECT(a),b)
- #define var_GetNonEmptyString(a,b) __var_GetNonEmptyString( VLC_OBJECT(a),b)
- /**
- * Increment an integer variable
- * param p_obj the object that holds the variable
- * param psz_name the name of the variable
- */
- static inline void __var_IncInteger( vlc_object_t *p_obj, const char *psz_name )
- {
- int i_val = __var_GetInteger( p_obj, psz_name );
- __var_SetInteger( p_obj, psz_name, ++i_val );
- }
- #define var_IncInteger(a,b) __var_IncInteger( VLC_OBJECT(a), b )
- /**
- * Decrement an integer variable
- * param p_obj the object that holds the variable
- * param psz_name the name of the variable
- */
- static inline void __var_DecInteger( vlc_object_t *p_obj, const char *psz_name )
- {
- int i_val = __var_GetInteger( p_obj, psz_name );
- __var_SetInteger( p_obj, psz_name, --i_val );
- }
- #define var_DecInteger(a,b) __var_DecInteger( VLC_OBJECT(a), b )
- /**
- * Create a integer variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline int __var_CreateGetInteger( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- return __var_GetInteger( p_obj, psz_name );
- }
- /**
- * Create a boolean variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline bool __var_CreateGetBool( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- return __var_GetBool( p_obj, psz_name );
- }
- /**
- * Create a time variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline int64_t __var_CreateGetTime( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_TIME | VLC_VAR_DOINHERIT );
- return __var_GetTime( p_obj, psz_name );
- }
- /**
- * Create a float variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline float __var_CreateGetFloat( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
- return __var_GetFloat( p_obj, psz_name );
- }
- /**
- * Create a string variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline char *__var_CreateGetString( vlc_object_t *p_obj,
- const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT );
- return __var_GetString( p_obj, psz_name );
- }
- LIBVLC_USED
- static inline char *__var_CreateGetNonEmptyString( vlc_object_t *p_obj,
- const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT );
- return __var_GetNonEmptyString( p_obj, psz_name );
- }
- /**
- * __var_CreateGetInteger() with automatic casting
- */
- #define var_CreateGetInteger(a,b) __var_CreateGetInteger( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetBool() with automatic casting
- */
- #define var_CreateGetBool(a,b) __var_CreateGetBool( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetTime() with automatic casting
- */
- #define var_CreateGetTime(a,b) __var_CreateGetTime( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetFloat() with automatic casting
- */
- #define var_CreateGetFloat(a,b) __var_CreateGetFloat( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetString() with automatic casting
- */
- #define var_CreateGetString(a,b) __var_CreateGetString( VLC_OBJECT(a),b)
- #define var_CreateGetNonEmptyString(a,b) __var_CreateGetNonEmptyString( VLC_OBJECT(a),b)
- /**
- * Create a integer command variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline int __var_CreateGetIntegerCommand( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_INTEGER | VLC_VAR_DOINHERIT
- | VLC_VAR_ISCOMMAND );
- return __var_GetInteger( p_obj, psz_name );
- }
- /**
- * Create a boolean command variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline bool __var_CreateGetBoolCommand( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_BOOL | VLC_VAR_DOINHERIT
- | VLC_VAR_ISCOMMAND );
- return __var_GetBool( p_obj, psz_name );
- }
- /**
- * Create a time command variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline int64_t __var_CreateGetTimeCommand( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_TIME | VLC_VAR_DOINHERIT
- | VLC_VAR_ISCOMMAND );
- return __var_GetTime( p_obj, psz_name );
- }
- /**
- * Create a float command variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline float __var_CreateGetFloatCommand( vlc_object_t *p_obj, const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_FLOAT | VLC_VAR_DOINHERIT
- | VLC_VAR_ISCOMMAND );
- return __var_GetFloat( p_obj, psz_name );
- }
- /**
- * Create a string command variable with inherit and get its value.
- *
- * param p_obj The object that holds the variable
- * param psz_name The name of the variable
- */
- LIBVLC_USED
- static inline char *__var_CreateGetStringCommand( vlc_object_t *p_obj,
- const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT
- | VLC_VAR_ISCOMMAND );
- return __var_GetString( p_obj, psz_name );
- }
- LIBVLC_USED
- static inline char *__var_CreateGetNonEmptyStringCommand( vlc_object_t *p_obj,
- const char *psz_name )
- {
- __var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT
- | VLC_VAR_ISCOMMAND );
- return __var_GetNonEmptyString( p_obj, psz_name );
- }
- /**
- * __var_CreateGetInteger() with automatic casting
- */
- #define var_CreateGetIntegerCommand(a,b) __var_CreateGetIntegerCommand( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetBoolCommand() with automatic casting
- */
- #define var_CreateGetBoolCommand(a,b) __var_CreateGetBoolCommand( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetTimeCommand() with automatic casting
- */
- #define var_CreateGetTimeCommand(a,b) __var_CreateGetTimeCommand( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetFloat() with automatic casting
- */
- #define var_CreateGetFloatCommand(a,b) __var_CreateGetFloatCommand( VLC_OBJECT(a),b)
- /**
- * __var_CreateGetStringCommand() with automatic casting
- */
- #define var_CreateGetStringCommand(a,b) __var_CreateGetStringCommand( VLC_OBJECT(a),b)
- #define var_CreateGetNonEmptyStringCommand(a,b) __var_CreateGetNonEmptyStringCommand( VLC_OBJECT(a),b)
- static inline int __var_CountChoices( vlc_object_t *p_obj, const char *psz_name )
- {
- vlc_value_t count;
- if( __var_Change( p_obj, psz_name, VLC_VAR_CHOICESCOUNT, &count, NULL ) )
- return 0;
- return count.i_int;
- }
- /**
- * __var_CountChoices() with automatic casting
- */
- #define var_CountChoices(a,b) __var_CountChoices( VLC_OBJECT(a),b)
- /**
- * @}
- */
- #endif /* _VLC_VARIABLES_H */